单项选择题
硫胺素常以( )的形式出现,为白色结晶,比较耐热,特别在酸性介质中相当稳定。 A.
乙酸盐 B.
硝酸盐 C.
盐酸盐 D.
硫酸盐
硫胺素常以( )的形式出现,为白色结晶,比较耐热,特别在酸性介质中相当稳定。 A.
乙酸盐 B.
硝酸盐 C.
盐酸盐 D.
硫酸盐
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单项选择题
Refer to Table 2.1. To maximize total production,
Refer to Table 2.1. To maximize total production,
A．Krystal should specialize in writing TV commercials, and Mark should specialize in writing poems.
B．Mark should specialize in writing TV commercials, and Krystal should specialize in writing poems.
C．Krystal should write poems and write TV commercials, but Mark should only write poems.
D．Krystal and Mark should both split their time between writing poems and writing TV commercials.